Shape
Frequency n4
Speed
Color
Overlays
θ = 0.00π
r = 
n = 4
r = e^sin θ − 2 cos(nθ) + sinµ((2θ−π)/24)
Fay, 1989 · polar trace 0…24π
n slider — change frequency
Arm — radial line to pen
Cross — origin crosshair